CuCl2 + 2NaNO3 mc023-1.jpg Cu(NO3)2 + 2NaCl What is the percent yield of NaCl if 31.0 g of CuCl2 reacts with excess NaNO3 to produce 21.2 g of NaCl?

the correct answer its:

random internal motion of atoms and molecules

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Final answer:

The primary cause of diffusion is the random internal motion of atoms and molecules resulting from their thermal energy, leading substances to move from areas of high concentration to areas of lower concentration until evenly distributed. Factors like temperature and the mass of diffusing molecules affect the speed of diffusion. The process continues until it reaches a dynamic equilibrium, where there is no concentration gradient and no net movement of substances.

Explanation:

The primary cause of diffusion is the random internal motion of atoms and molecules due to their thermal energy, a concept derived from Physics. This motion allows substances to move in a way that they can evenly distribute themselves throughout a given space. As a result, diffusion is characterized by movement from high to lower concentration areas, a process that goes on until the substance is evenly distributed in a system.

Several factors can affect diffusion, such as temperature and the mass of the diffusing substance. Higher temperatures enhance the energy and therefore the movement of the molecules, leading to an increased diffusion rate. In contrast, lower temperatures decrease the energy and movement of molecules, thus reducing the diffusion rate. The mass of the molecules diffusing also plays a role - heavier molecules move slower, and therefore diffuse more slowly, whereas the reverse is true for lighter molecules.

A concentration gradient is the factor that primarily fuels the diffusion process. Greater the difference in concentration, the more rapid the diffusion. In case of solutions containing more than one substance, each type of molecule diffuses according to its unique concentration gradient, independently of other substances.

Eventually, the system reaches a stage known asdynamic equilibrium. At this stage, there's no net movement of the substance, yet the molecules continue to move around in the space. The concentration gradient no longer exists, which means that diffusion has ceased.

Learn more about Diffusion here:

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Answer:

B

Explanation: